Autointerpregraph signal recorder



May 8, 1945. s. ROSE I ATOINTERPREGRAPH SIGNAL RECORDER Fild Nov. v25,'1943 3 Sheets- Sheet l ma.. //r: m9

@Q wf Pm?? r@ AIO os wenn. md, www, um wwdb N nwowwf v m9 N9 @e d. am.@Q A om. @mi FQ A 5, .9. Il?. v r: Q, Wm o l Y o 11V \\w. m: QN, ...rmNumf m: owmmrbw ou. o: .../m. `5. M oo.

c f www?? INVENTOR. LuTI-Ler 5. R m5 E ATTORNEYS.

May 8, 1945. L. s. RosE AUTOINTERPREGRAPH SIGNAL RECORDER 3 Sheets-Sheet2 Filed NOV. 23, 1943- May 8, 1945. L. s. RosE Y 2,375,588

AUTOINTERPREGRAPH SIGNAL RECORDER y Filed Nav. 2s, 1945 5 sheets-,sheet's FIG. e.

" FIG. 1o.

AFIG-12.. lsb' |52 INV ENTOR.

LLJHEI" El. ITQCIEE Patented May 8, 1945 UNITED STATES PATE-NT OFFICEAUTOINTERPRE GRAPH SIGNAL RECORDER Luther S. Rose, San Antonio, Tex.

Applcatiil Nvembel 23, 1943, Slil N0. 511,4 39

(o1. iis-2e) 4 Claims.

Tlirisinvention relates to telegraphy and more particularly to yanautointerpregraph signal recor-oer, and is an improvement upon theprinting telegraph receiver disclosed in my U. S. Patent No. 2,323,155,dated June 29,1943- An important object is to provide a novel telegraphsystem embodying means for receiving international Morse code or anycode consisting oi a combination of dots and dashes or, in other words,long and short electrical impulses, representing alphabetical andnumerical characters, this means functioning to convert the dots anddashes into typ'ewritten messages.

A further object is to provide av system of this character which may beused universally to decode messages, and which System is adaptable foruse in wire telegraphy as well as in connection with wireless telegraphyfor the translation of code signals into print.

Another' object of the invention is to provide a receiving system forcode messages wherein the code signals are translated into print byelectro-magnetic meansoperable for routing the signals to proper keyactuating means of a typewriter.

A still further and important object of the invention is to provide acode receiving and printing system of this character wherein the numberof vcontrol relays is reduced to a minimum, thus providing forsimplicity', low manufacturing cost, and reduced floor space'.

A still iurther object is to provide a, receiving system for codemessages which may be readily associated with standard typewriters fortyping the code messages intotypewritten messages.

Another important object is to eliminate certain relays contained in theapparatus disclosed in my patent referred to above, and to employ, witha sensitive relay, two associated Small, light weight electro-mechanicalswitches.

Gther obiects' and advantages of the invention willbe apparent from thefollowing detailed de scription of the invention, taken in connectionwith the accompanying drawings, forming a portion of this specification,and in which drawings:

Figure 1 is a wiring diagram of a preferred embodiment oi thelallparatus.

i'igure 2 is a view of a preferred form of circuitcontrolled switchmeans for the apparatus.

Figures 3, 4, and 5 are diagrammatic views illustrating progressiveposition of electro-mechanical switching devices forming parts of thecircuit-'controlled switch means.

Figures 6, 7, and 8 are enlarged fragmentary D; and spacing 0r operating`means F for the characters-receiving means G.

The typewriting machine A may have a plurality ol conventional key4levers I5, operating type bars in the usual manner, the connectionbetween these key levers l5 and the novel apparatus being armatures tobe later described.

The receiving relay means B, includes a receiving relay iii, which is,preferably, a sensitive one, employed to pick up the weak signals andrelay the impulses to the local circuit of the ap' paratus, an armaturel'l, associated with the relay lt, pvoted at one end and so movablebetween spaced contacts lil and i9 and connected through battery linesor conductors 29 and 2l to battery 22,there being an open-circuit switch23, having switch 24 and contact 25 interposed in the battery lines.`The armature l'l is normally held in engagement with the contact i8 as'by a retraction coil spring 25.

The Contact lt forms one terminal of an automatic time delay switchmeans 2l, while the op'- posite terminals 28 and 2S of the switch meansl.' are connected in series thru conductor 30 to the spacing electromagnet 3l into the ground 3l. The switch means 27 may be considered as acontrolswitch and is slower in actionv than the receiving relay it, thatis, it Opens and closes the circuits atthe contacts 28 and 29 onlyafterv a certain period oi time has elapsed and after the circuit hasbeen closed at contact I8 by the relay it. This switch means 21 performsthe functions ol the relays 2l and 22' described in my U. S. Patent No.2,323,155. Preferably, the switch means is of as light weight aspossible.

ltmay be well 'to state here that the switch means 2f'I is controlled bythe armature Il of the relay i6. An arm 33 (shown in Figure 2) mountedon the armature I'L'and not necessarily insulated from same, rotatablycarries, at its free end, a small rotating member or wheel 34, whichlatter may be of rubber, ber or leather and is free to rotate and whenit is in the up position, as shown in Figure l, it bears against thearcuate face 35 of the arm 36 of the switch means 21 in such a manner asto cause the arm 36 to rotate in a denite direction, since it ispivoted, as at 31 at its center. This causes a straight portion 38 ofthe arm 3B, extending radially from pivot 31, tomove in the direction ofthe arrow 39 towards the contact 28 to close the circuit, when a certaintime has elapsed after the closing of the circuit at the contact I3 bythe armature I1. From this, it may be seen that if this moves at acertain deinite rate of speed and an electrical impulse is immediatelyreceived by relay I6, the circuit is closed at I3 only for a short timeperiod and the moving straight portion 38 of the switch arm 36 will nothave time to reach the contact 28 and, therefore, the circuit will notbe closed at that point. However, if the armature I1 remains in the upposition for a longer period. of time, the portion 33 will have time tomove around to the position where it will close the circuit at contact28, and energize electro magnet 3|. If the armature remains up for astill longer period of time'the portion 38 will continue to move aroundin the direction of the arrow 39 towards the contact 29 and, if enoughtime elapses, it will close the circuit again at 29 causing the electromagnet 3l to become energized the second time and will in turn performthe same function of the relay 22 as shown in my prior patent referredto above, i. e., causing an extra space to be made, at the proper time,on the typewriter or, in other words, the same as the spacing betweentwo sentences.

The switch arm 3G is as light in weight as possible and free to rotateapproximately one half revolution, more or less, against the tension ofthe retraction spring 4t. The instant the pressure from the wheel 34 isreleased, the arm 36 will automatically swing back, by the pull of thespring 40, so that they portion 38 will contact the stop 4 l, and theportion 33 will be free to start all over again the instant the wheel 34makes contact with the arcuate face :l of the switch arm 36. The wheel34 rotates at a substantially constant speed, controlled as by the motor42 (there being a suitable conventional Iiexible connection be tween themotor 42 and the shaft on which the wheel 34 is mounted). The speed ofthe motor 42 is regulated by the means which may be a governor orrheostat.

If the portion 33 of the switch arm 36 should rotate past the contact 29so that the wheel 34 would normally run ofi' the arcuate face 35 a smallelectromagnet 44 (connected to the conductor 45, and grounded at 45 andenergized by the battery 22 when the armature ll makes contact or closesthe circuit at the contact I8) will attract the portion 38 (constructedof magnetic material) and draw it slightly past the point where thewheel 34 would run off of the face 35 (and would continue to wearagainst this face). Therefore, no matter how long the armature l'!remains in the up position and the switch arm 33 rotates to a, certainpoint, the latter will stop at the electromagnet 44 and, while the wheel34 will con tinue to turn, it will not rotate against the face 35.

The arm 33 of Figure 2` is secured rigidly to the armature I1 in any waymost convenient.

Both contacts 28 and 29 are connected thru conductor 30 to conductor 41,which leads to the typing circuit which will be described later. Fromcontact i8 a conductor 4B extends to a brush contact 49, electricalyconnected with the switch arm 36, and the conductor 45 is connected withthe conductor 48.

The contact lll forms one terminal of switch arm 5!! through conductors5l and 52 and brush 53. The xed contact 34 leads to the switching meansC thru line 55. This switch arm 5D and associated structure forms a slowacting switch similar to the switch arm 36 and associated structure, ispivoted as at 5B, has an arcuate face 51, a straight arm portion 53,contraction coil spring 59 operatively connected to the portion 58, astop Gli and electromagnet 6l for the portion 58. rlhere is alsoprovided a conductor 52 to the conductor 5l and ground 63 for theelectromagnet Eil. This switch arm 5i? differs from arm 36 in that itoperates when an electrical impulse is being received by relay i6 whichcauses the arma ture ll to move down and the wheel 34, contacting thearcuate face 51, eieots rotationof the arm Eil) in the direction shownby the arrow 64 toward the contact 34. This switch operates only when anelectrical impulse is being received, while switch arm 3E operates onlywhen no electrical impulse is being received. Only one of the twoswitches operates at any one time. If an electrical impulse of shortduration is received by the relay I3 the armature Il moves downwardmaking contact with contact I9 and, at the same time, the wheel 34contacts the face 51 andstarts the arm in the direction of the fixedcontact 54. However, if the impulse is of a short duration only and thespeed of the motor 42 is true, the arm 5Fl does not reach contact 54,therefore the circuit will not be completed. If an electrical impulse ofa longer duration is received by the relay l5 the arm 50 will have timeto reach contact 54 electrically connected to line 55.

The electro-mechanical switching means C serves to route the receivedsignals or electrical impulses, for operation of the proper keys of thetypewriter A, and embodies a ratchet or escapement means 65 operable forcontrolling the position of two rotating members or switches 66 and 61.

The switch 66 may be considered a group selece tor switch, that is, itselects the letter or character group to which the particular code groupbelongs, while the switch 61 may be considered a combination selectorswitch, as it selects the proper circuit switching combination for eachparticular code combination.

The ratchet escapement means 65 embodies a rotating member or ratchetwheel 63 fixed upon a metallic shaft 69 suitably journaled in a support10 shown in Figure 2. This shaft 89 is rotated by means of a motor 42which is connected to the shaft through a suitable train of speedreducing gears 1|, to reduce the speed, and a sliding clutch 12 whichlatter may be any preferred form. The oppositeside of the sliding clutch12 is connected to the escapement wheel $8, by cooperation of anexpansion coil spring 13. The motor may be run continuously and isconnected to the shaft 69 through the sliding clutch 1l with just enoughpressure to cause the spring 13 to contract sufliciently to cause theshaft 69 to turn normally when the dog or stop arm 14, to be described,is disengaged from the teeth of the escapement wheel 68.

It may be noted that, by having the spring 13 positioned as it is, themotor 42 is not required to turn as fast as it normally'would do as theescapement wheel B does not turn continuously, but operatesintermittently; therefore Ythe spring 13 will be caused vto comp-ress toa certain tension and as quick as the dog or stop arm 14 is disengagedfrom the teeth of the wheel t3, `the latter will immediately rotate theshaft (with vthe switches) thereby speeding up the action of theswitches 96 and 51. This is very important in the operation of theapparatus as a whole. As shown, the ratchet wheel 69 is provided withtwelve spaced apart teeth or lugs 15 and I5 to 35, the last being thestarter tooth and this latter presents a greater area to thedog 14 thandoes the teeth 15 and 15 to 84, whereby one movement of the armature 95will not wholly release the tooth 85 from dog 14, but a second movemento1 the armature 85 will effect such release, and each time the armature95 moves upwardly to release a tooth, other than tooth 85, the wheel 08will rotate a step, this to be explainedsubsequently in detail.

Rotation of the escapement wheel 68 is controlled by two relays B6 and01 which are respectively grounded on one side as at 88 and 89. One sideof the relay 81 is connected thru line 90 with the battery line 20,while one Side of the relay 86 is connected thru line`5| with thecontact I9. Thus, it will be seen, that operation of the escapementmeans 65 is controlled by the relay |6 and battery 22. It will be notedthat current will ow directly from the battery 22 thru relay 81 toground 89 and, thereby, keep the relay 81 energized until the circuit isbroken in this line, as will later be seen, by the open circuitingswitch 23. The relay 81 has an armature 9| pivoted as by pin 92 andspring urged as at 93 against a stop 94. There is also an armature 95for the relay 86, pivotedl by the pivot pin 92 at one end thereof and isnormally spring urged against. the armature 9| by a retraction coilspring 95. The dog or step arm 14 is the free end part of the armature95. The pivot pin 92 is a pivot for both armatures and extends through asuitable stationary member, as a bearing. This arm 14 ycooperates withthe starterrtooth or lug 05 of the escapement wheel 68 for holding thelatter at a starting position, when the dog or stop arm 14 is disengagedfrom the ratchet teeth or lugs 15 to 84 and'15.

When the relay 81 is energized, the dog 14 is forced up, into a positionfree of the lower part of the starter lug 85. Now, each time thereceiving relay I6 is actuated and causes the armature I1 to engagemomentarily the contact I9, a circuit will be closed thru relay 86 andcause its armature 95 to move upwardly as in Figure 4, with the dog 14fully releasing the lugv 85, so that the wheel 68 will be released androtate one notch or step in the direction indicated by the arrow 96.Thus, when the relay 81 is energized, the wheel 68 will be rotated onetooth or lug each time an electrical impulse is received thru the relay86. A leaf spring 91 is mounted. on the armature 95. Its function is totake up shock when the tooth or lugs strike the dog 14.

Key actuating means D includes solenoids for operating the keys of thetypewriter A and are arranged in banks andare associated with selectorswitching means E provided for completing a circuit thru these banks insequence. For convenience, these key-actuating solenoids will bereferred to by the .letters andv numerals with which they areassociated. vWhile only five banks of solenoids have been shown, thisnumber may be increased in accordance with the number of code charactersto a code group which it is desired to receive. In the arrangementillustrated, the numeral |00 represents a bank of two sole noids orelectromagnets for operating the lkeys T and E; IOI a bank of foursolenoids for operating the keys M, N, A and I; |02 a bank of eightsolenoids for operating the vkeys O, G, K, D, W, R, U and S; |03 abankof sixteen solenoids for operating the keys H, V, F, L, P., J, B, X,C, Y, Z and Q, four of these solenoids being extra and need not beemployed unless necessary; and |04 -a bank of solenoids for operatingthe numeral keys of the typewriter. These key-actuating solenoids areeach independent of one another and are connected to' separate springcontacts |05 which are mounted on an insulated strip |06 disposedlongitudinally of the shaft 69.

The metallic shaft 69 is grounded as at |01 and is provided withmetallic segments |08, |09, H0, III and II2, shown particularly inFigures 2 to 5, which are so spaced about the shaft and of such lengthand so related to the spring contacts |05 as to complete electricalcircuits vthru their respective banks of solenoids in sequence when theshaft is rotated in the direction indicated by the arrow I3 theirdisposition radially about the shaft being such that only one segmentwill contact a solenoid bank at one time. As will be seen,

the segment |08 completes a `circuit thru thev solenoid bank |00 toground I0| ;y the segment |09 completes a circuit thru the solenoid bank|0I to ground |01, while the segments IIO, I|I and |I2 likewise completecircuits thru their respective solenoid banks. |02, |03 and |04 to`ground |01. to the ground |01 at any one time, the rotating switch 66acting as a.stepping switch and progressively closing the circuits tothe banks of solenoids, starting with the closing of the Circuit to thesolenoid bank |00.

Respectively associated with the solenoid banks |00 to |04 is a seriesof solenoid selector or rout ing switches II4, IIE, IIE, I|1 and IIBwhich control opening and closing of circuits to selected solenoids ofthe banks as is apparent from Figure 1. The switch II4 may be asingle-pole double throw switch, the switch I I5 a double-poledoublethrow switch, the switch ||6 a four-pole doublethrow switch, theswitch I I1 an eight-pole doublethrow' switch and the switch H6 aneight-pole double-throw switch. The switch blades of the switches II4 toIIB are connected to control rods or bars II9 and are held in an upwardnormal position by springs |20. The switch blade of the switch II4 isconnected by conductor 41 to the line 30.

These selector switches II4 to II8 are respectively controlled by aseries of holding relays I2 I, |22, |23, |24 and |25, each having anarmature |26 connected to the control `bar I I9 of their respectiveselector switches. The armatures |26 are electrically connected by line|21 to the line leading to the battery line 20. 'Each of the relays |2|to |25 is grounded at one side as at |28 and at the other side of eachare respectively connected tor contacts |29 to |33 which are engaged bythe armatures |25. Thus the relays I2I to |25 when energized, functionto operate their respective selector switches thru the control bars ||9and against the action of the springs |20. Also, when the armatures |26are vdrawn down they will engage their associated contacts A|29 to Thus,only one bank of solenoids is closed |33 and maintain a holding circuitthru the relay until the battery circuit is opened again.

The rotating selector switch 61 controls circuits to the holding relays|2| to |25 and embodies a rotating switch arm |35 which is xed on, butelectrically insulated `from, the metallic selector switch shaft 69.This arm |35 is connected to a brush arm |36 which is, in turn,electrically connected by the line 55 to the contact 54, whereby, uponclosing of the switch 50 the arm |35 will be connected to the batteryline 20. The rotating switch arm |35 coacts with'a series of contacts|31 to |4| inclusive, which are in turn respectively connected to theholding relays |2| to |25.

Each of the typewriter key levers |5 is provided with an armature |45with each of which one of the key actuating solenoids is associated in amanner such as diagrammatically indicated in Figure 1. Thus, each time acharacter has been typed the circuit will be broken at the opencircuiting switch 23.

When the circuit is broken at the switch 23, the escapement means 65 andthe selector switches 66 and 61 are all returned to a starting positionfor proper reception of the next code group.

At this point, an example of the cycle of operation of the receivingsystem for the code letter F, as used in the International Morse code,will be given. The code letter F consists of two dots, a dash andanother dot or, as considered in electrical terms, two by an impulse ofshort duration, then one of longer duration and, after this, anotherelectrical impulse of short duration, this combination of short and longelectrical impulses going to make up the code combination for the letterF.

In Figure 1 the escapement means 65 is shown in its starting positionfor reception of a code group, the selector switch 66 is shown at aposition when the letter F is to be typed, while the switch arms 36 andl50 are shown in their normal positions. Upon closing of the switch 23 abattery circuit is completed thru the relay 81 to ground 89, thusenergizing this relay so that its armature 9| moves to the position inFigure 3 with the dog 14 of armature 95 disengaged from the lowerportion of the starter tooth 85, the dog 14, however', still engages apart of the tooth 85. Since the switches 66 and 61 are on the same shaft69 with the ratchet or escapement wheel 68, the switch arm of the switch61 will now engage contact |31 but segment |06 of switch 65 will nothave engaged the spring contacts |05 of the solenoid bank |00. It willbe seen that closing of the switch 23 places the receiver in a startingposition as shown in Figure 3, and all of the code groups will begin atthis point.

Now, upon receipt of the rst short impulse of the letter F at thereceiving line of the relay |6, the impulse will, in turn cause thereceiving relay |6 to become energized and operate the armature l1,which will be only momentarily, as this electrical impulse is of shortduration. When the armature l1 is actuated by the relay I6 it engagesthe contact I9 and completes two circuits at the same time, one circuitbeing thru the relay 86 of the escapement means 65 and causing thearmature 95 to be actuated, allowing the escapement or ratchet wheel 68to be moved up only one step as shown in Figure 4. The second circuitcompleted by the armature I 1 is from battery line l0 thru armature |1,electromagnet 6| to ground 63, thereby tending to actuate or energizethe electromagnet but, in View of the fact that the straight portion 58is nowhere near the electromagnet 6| nothing happens unless the portion58 moves around too far and enters the magnetic field of electromagnet6| and is held there, in place, until the circuit is broken again at thecontact I9. The relay 86 is adapted to operate quickly while the twoswitches 26 and 50 operate with a delaying action. The switch 50, whenthe speed regulator 43 is properly adjusted, will operate or close thecircuit through portion 58 only when dashes are received, while therelay 86 operates on both dots, or short impulses, and dashes, or longelectrical impulses. The switch 36 operates or closes the circuitelectrically connected to contacts 28 and 29 only during long durationsignals or during long intervals of time as between long and shortimpulses in a code group 0r combination, as for letters of the alphabet,figures and the like.

By referring to Figure 4 it will be seen that, upon actuation of thearmature 95 the dog 14 has been released from the starter tooth 85,which is the starting point of all code combinations or the beginningpoint of each letter, and that the dog 14 has engaged the next ratchettooth 15. The switch arm |35I of the selector switch 61 is on thesegment |31 which is connected to the holding relay |2| which operatesthe solenoid selector switch ||4, but, since the switch 50 is slow inoperating and will not operate on short impulses, the circuit is notcompleted thru relay |2| and the switch I4 will remain in its upward ornormal position.

The rst dot or short impulse of F is followed by a space, causing relayI6 to become I deenergized and the armature |1 returned by the spring 26to make contact with the contact I8. This, in turn, connects theelectromagnet 44 and switch 36 into the circuit from grounded battery 22to line 20, armature I1, contact I8, line I4, brush 49, line 45,electromagnet 44 to ground 46.

The switch arm 36 is normally held in the position shown in Figure 1 bythe spring means 40. When the armature |1 is in the up position thewheel 22 engages the arcuate face 35 in such a manner that, if the smallmotor 42 is operating, the wheel will, in turn, cause the straightportion 38 to start moving in the direction of the arrow 39 toward thecontacts 28 and 29. Since the spaces between characters of acombination, are of short duration and equal to one dot, there will notbe time for the switch 36 to reach the contacts 28 and 29 as it is slowin operation, similar to switch 50,

The circuit is now open to the relay B6, allowing the armature 95`to bepulled downwardly by the spring 96, thus releasing the tooth'15 andallowing the ratchet wheel 68 to rotate until the dog 14 engages theratchet tooth 15. As in Figure 5, the segment |08 of the rotating switch66 is now engaging the spring contact fingers |05 of the solenoids T andE of the bank |00 (the current reaching the ground thru shaft 69) but asthe switch 36 has not completed the circuit at contact 28, neither ofthe solenoids in the bank |00 will be energized to operate a key of thetypewriter.

The second impulse in the combination for the letter F is also of shortduration and appears immediately following the first dot and space. Now,as before, when the second impulse is received, the relay |6 is operatedwhich, in turn, causes the ratchet means 6-5 to operate, moving, inturn, the rotating switch arm |35 on the segment |38 of the switch 61and placing the relay |22 in condition to be actuated if and when switch50 is actuated, as the, circuit is never complete until switch arm 50has closed the circuit at contact 54 and, as the secondimpulse is ofshort duration, it will not cause the switch arm 50 to actuate,therefore the circuit is left open thru the relay |22, with the switchIII in its upward normal position.V

The second'impulse is immediately followed by a space (as heretofore)and this space followed by a third impulse whichis of longer duration.This will actuate the ratchet means 65 and will cause the slow actingswitch 50 to rotate, closing the circuit contact 54 and causing therelay |23 to be operated from grounded battery 22, switches 2| and 23,line 20, cont'act I9, lines 5I and 52, brush '53, switch arm 50, contact54, line 55, brush |36, rotating switch arm |35, segment |39 and relay|23 to ground. The relay |23 being energized, attracts its armature |26,and causes a connection to be made at the contact |3I and at the sametime, moves the switch arms of the switch |65 downwardly as in Figure 1.Of course, the solenoid selector switches I|4 to ||8-remain in an upwardor normal position for the` short impulses or dots and are moveddownwardly by their respective relays I2| to |25 on the long impulses ordashes of the code combination.

There is now another circuit completed from grounded battery 22,switches 2| and 23, lines and 91armature |26 of relay |23, contact |3I,relay |23 to ground |28, thereby completing this circuit and keeping therelay |23 energized even after the moving contact has moved to anothersegment of the switch 61. This circuit will therefore remain closeduntil the circuit is opened at the switch 2.3 or anywhere in series withthe circuit to the battery 22.

As the third or long impulse toy make up the code combination for F isfollowed by a space of short duration Athe armature I1 of relay I6 isreturned to the position as shown engaging contact I8; also the shaft 69has now been rotated to a position -where the segment makes contact withthe contact fingers |015 of the sole- .noid bank |02 and' connects thesolenoids of bank |02 to ground at |01. In view of the fact that thespace following the third electrical impulse is of short duration, itwill not cause the switch arm 36 to be actuated, therefore there willnot be a complete circuit thru the solenoid bank |02 into ground |01 andnone of these solenoids in this bank will be caused to operate.

The fourth and last impulseof the code combination for the letter Ffollows a space of short duration and causes the ratchet means 65 to beactuated as before, which, in turn, moves the contact arm |35 or theswitch 6T to the segment |40 and the segment of the switch shaft 69 intoengagement with the spring contacts |05 of the solenoid bank |03. Thisposition of the contact arm |35 is before the last impulse has beencompleted and the segment III is at the end of the last impulse andafter the receiving relay I6 is de-energized. As stated, the contact arm|35 is now making contact with the segment leading to relay |24, butthis relay |24V cannot be caused -to actuate until the circuit is closedbythe slow acting switch ,50, therefore, `the relay |24 will not operatethe selector switch I II on the fourth impulse as it is of shortduration andthe armature I'l of relay I6 has now been returned, breakingconnection at the contact I9. The armature I1 when returned to theposition shown making connection with the contact I8 completes thecircuit to the switch arm 36 (which is slow in operation) this circuitincluding battery 22, switches 2| and 23, armature I'l, contact I8,brush 49 and switch arm 36. A circuit thru the solenoid bank |03 is nowopen only at the point between the arm and the contact 28.

As the time elapsed after the fourth and last impulse is greater thanthe spacing time between any of the electrical impulses for thatcombination (this spacing time being equal to one dash) the switch arm3B will complete the circuit at contacts 28 and 20. At contact 29 acircuit will be completed from contact 29 thru contact 28, line 30,solenoid 3| to ground 32. This solenoid 3| is employed to cause thetypewriter to make spaces, therefore spaces are made on the typewriter,regardless of whether a letter has been typed or not.

Upon actuation of the switch arm 36, there is a circuitclosed (at line4l) and completing the circuit thru one of the key-actuating solenoids,causing only one letter (F, in this case) to be typed on thetypewriter.. This circuit is completed as follows: thru switch I I4 andalong the wire to uppermost switch H5 (of Figure 1) (as segment |00 isnot active the circuit is not completed thru solenoid bank |03) thencethru the uppermost switch II5 and along the wire therefrom to uppermostswitch H6 (of Figure l) as segment |09 is not active the solenoid bank|04 will not be actuated) thence through the uppermost switch I I6 andalong the wire therefrom to The open-circuiting switch 23 is adapted toopen momentarily each time a key ofthe typewriter has been operated, andwhile shown, in Figure 1 for convenience only, as being operated by thearmature |45 one of the solenoids, this switch is intended to beassociated with the spacing bar mechanism of the typewriter whereby theswitch 23' will be opened each time that a letter or character is typedor a space made. As will be seen, when the switch 23 is opened' allcircuits of the receiver will be open circuited, except the Amotorcircuit. This results in actuations as follows: First, the relays |2I to|25 will have been cleared and their switch actuating armatures returnedby the springs |20 to normal positions. Next, the ratchet or escapementwheel 68 is caused tov rotate in the direction of the arrow 96 to anormal position as in Figure l, so that it will be ready to start at thebeginning (dogY 'I4 holding starter tooth 85) for another letter..Opening of the switch 23 opens the circuit to the relay 8l' whereby itsarmature 9| is pulled up by the spring 93. The armature 95 being pivotedat 92 withdraws the dog I4 from engagement by the teeth of theescapement wheel 68 so that the wheel 68 and shaft 69 are free to turn,whereby the switches 66 and 61 are returned to a normal or startingposition. The starter tooth 85, when it engages the dog 14, causes theratchet wheel 68 to be stopped at the position shown in Figure l. As theswitch 23 is opened only momentarily (until the typewriter key has beenreturned to normal) the relay B'I is again energized and attracts itsarmature 9|, whereby the dog 'I4 releases the lower portion of the toothbut engages the upper part of this tooth, as in Figure 3. With referenceto Figure 3, all of the code groups begin at this point with the switcharm |35 of the switch 61 always on segment |31 during the iirst impulse(as in Figure 4) and the segment |88 of the switch 66 always engages thecontacts |35 of the solenoid bank |06 at the end of the rst impulse asin Figure 5.

If the code combination for a certain `letter consists of three impulsesthe segment I of the switch 66 will always engage the contacts |05 ofthe third solenoid bank |62 at the end of the combination.

If the letter consists of a. combination of four electrical impulsesthev segment will make connection with the iourth solenoid bank |03 atthe end of the code combination (and so on for any code letter group)while the contact arm |35 of the switch 61 always makes connection withthe segment for the proper relay |2|, etc.,

depending upon the impulse received, so that and the circuits closedagain, the armature |1 of relay I6 engages Contact I8 and connectsswitch 36 into the circuit thru brush 41 and, if no electrical impulsesimmediately follow the rst code group, the arm 38 will be caused to movetoward the contact 28 and, as no circuit is completed thru any of thesolenoid banks but is completed thru the spacing coil 3| to ground 32,when the arm 38 engages the contacts 28 and 29 to close the circuit, noletter will be typed but a space will be made as between two words in asentence. Then, if still no further electrical impulses are received byrelay I6 the switch 36 will have had time to open the circuit at 21 andwill, in tu'rn, cause the arm 3B to continue to move in the direction ofthe arrow 39 toward the contact 29 and, completing the circuit again,momentarily make and break the circuit to the spacing coil 3|, andcauses another space to occur, the same as between the end of one andthe beginning of a new sentence. From this it will seen that letterswill be spaced, words will also have the correct .spacing between them,and also the correct spaces will occur between sentences as in anyordinary typed letter. 1

The spacing mechanism F for the characterreceiving means representeddiagrammatically in Figure 1 at |50 is presented in more detailed formin the Fgures to 13 inclusive, in which the character-receiving means Gis shown as a tape 5| on which the message is to be typed, the

tape |5| being in a roll, housed in a slotted container |52 similar to aconventional typewriter ribbon roll housing. Typing paper |53, ifdesired is provided with a sticker |54 made of material strong enough toguide the tape (preferably a piece of fabric gummed on one side andslotted as shown at |55, |56 and |51). This, in turn, may be gummed tothe paper |53 and used as a guide. It is only necessary then to placethis sheet of paper |53 around the typewriter roller |58 as shown inFigure 1l and secure the roller |58 to the desired position so that thetype bars will strike near the center of the slot |56. This may be doneby using the marginal stops on the typewriter or any other meansavailable, since the typewriter carriage may be set to stop at most anyposition by using the stops, and the typing bars will continue to strikein the same position while the tape will be moved one space each time aletter is typed.

Although Figure 9 shows a preferred form of tape operating means F anyother means may be employed which will be suitable for the purpose. As amessage is being typed the armature |60 is drawn or pulled down by themagnet 3| from the stop |6|. This armature is attached or pivoted as at|62 to the center of the ratchet wheel |63. During the downward movementof the armature |60, the pawl |64 prevents the ratchet wheel |63 fromrotating backwards. When the electromagnet 3| becomes de-energized thecontraction coil spring |65 pulls the armature upward and against thestop |6| and, at the same time, this rotates the ratchet wheel |63 acertain distance, equal to a typewriter space since the armature |60 isalso provided with a pawl |66 which engages the teeth of the ratchetwheel, as in Figure 9. This causes the tape |5|, which is contacting theperipheries of the wheels |66 and |61, to move the distance of onetypewriter space. able means, as a weight |68 or a conventional take 4upmay be provided to keep the tape |5| taut. There is, of course, a secondpawl 66 pivoted, as at |69 to the armature |60 adapted to engage theteeth of the ratchet wheel |63, as is apparent so that, when thearmature |60 moves downwardly upon energization of the electromagnet 3|,the pawl |66 will ride over the teeth, but the pawl |64 will hold thevratchet wheel |63 against rotation except when the armature |60 movesupwardly.

By combining the sensitive relay I6 with the two small and lightelectro-mechanical switches 36 and 50 I have eliminated the three relays2|, 22 and 48 disclosed in my previous Patent No. 2,323,155 and have, atthe same time, decreased the weight, as the motor normally ,used in thecode receiving section, is used to operate the switches 36 and 5|) inthe present application. By using this switching arrangement, a morepractical and reliable method of analyzing the incoming code signals isprovided, particularly separating the long electrical impulses from theshort impulses.

The electro-mechanical switching means, or

ferred to above, is now presented in a practical form. A more rapiddevelopment of the switchy ing operation, with less motor speed andpower is provided for, permitting the use of a smaller motor requiringless space and weight and, `by using a small speed regulated motor forthe driving power for the switches 36 and 50 a more accurate anddependable speed regulation for synchronizing the electro-mechanicalanalyzing switches with the incoming code signal, is obtained, withelimination of the relays such as 2|, 22, and 48 forming a part of theassembly disclosed in the prior patent.

Various changes may be made to the form of the invention herein shownand described without departing from the spiritof the invention or scopeof the following claims.

What is claimed is:

1. In an autointerpregraph signal recorder, a receiving circuitincluding a receiving relay responsive to dot and dash code signalimpulses; a local circuit separate from the rst circuit, a normallyopen, slow-acting dash switch, and a normally open slow-acting timeinterval switch, both in the local circuit, each including a switch armhaving a pivoted portion provided with arcuate face and a contact, meansybetween said relay and switches for closing them, including anarmature, pivoted at one end and responsive to Any suit-` said relay, arotating member carried hy said armature and alternately contacting thearcuate iace of each switch; electromagnetic means for moving saidarcuate faces out of contact with said rotating member independently ofsaid armature and after said switches have closed; a printing circuitcontrolled by the time-interval switch and including selector switchmeans; and circuit selector means controlled by the dash switch foroperation of the selector switch means.

2. In an autointerpregraph signal recorder, a receiving circuitincluding a receiving relay responsive to dot and dash code signalimpulses; a local circuit separate from the first circuit, a normallyopen, slow-acting dash switch, and a normally open slow-actingtime-interval switch, both in the local circuit, each including a switcharm having a pivoted portion provided with an arcuate face and acontact, the acuate face of said time interval Switch being greater inlength than the length of the Iface of said dash switch; means betweensaid relay and switches for closing them, including an armature, pivotedat one end and responsive to said relay, a rotating member carried bysaid armature and alternately contacting the arcuate face of eachswitch;v a printing circuit controlled by the time-interval switch andincluding electromechanical switching means, said electro-mechanicalswitching means including rotating members; and a single means forrotating all of said rotating members.

3. In an autointerpregraph signal recorder, a receiving circuitincluding a receiving relay responsive to dot and dash code signalimpulses; a local circuit separate from the first circuit, a normallyopen, slow-acting dash switch, and a normally open slow-actingtime-interval switch, both in the local circuit, each including acontact, a switch arm having a pivoted portion provided with an arcuateface and a contact of magnetic material; means between said relay andswitches for closing them, including an armature pivoted at one end andresponsive to said relay and a rotating member carried by said armatureand alternately contacting the arcuate face of each switch; separate4means to disengage each of said arcuate faces from said rotating memberupon the closing of said switches, each vof said last named meansincluding an electro-magnet disposed in the path of travel of the switcharm with which it is associated, each electro-magnet being in said localcircuit; a printing circuit controlled fby the time-interval switch andincluding selector switch means; and circ-uit selector means controlledby the dash switch for operation of the selector switch means.

4. In an autointerpregraph signal recorder, a receiving circuitincluding a receiving relay responsive to dot and dash code signalimpulses; a local circuit separate from the first circuit; a normallyopen, slow-acting dash switch, and a normally open slow-actingtime-interval switch, both in the local circuit, each including a switcharm having a pivoted portion provided with an arcuate face and a contactarm, and said timeinterval switch having a pair of spaced apart fixedcontacts, disposed in the path of travel of the contact arm of saidtime-interval switch and a lead connecting said fixed contacts meansbetween saidrelay and switches for closing them, including an armature,pivoted at one end and responsive to said relay, a rotating membercarried by said armature and alternately contacting the arcuate face ofeach switch; and a printing circuit controlled by the time-intervalswitch and including electro-mechanical switching means, and a characterspacing means; said lead extending to said character spacing means.

LUTHER s. ROSE.

